Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2e578745a01d5107b19ab278edbc7b971eacf1919ef43a2ae53465c4bd1f3d6' 
  AND token = 'qgyNiwq4/m4NDHip/XiujSS69SM1ORcXSmBiU2msGLo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}